Super-FRS Beam Tracking concept
Super-FRS beam tracking is a major Finnish in-kind contribution to FAIR. Super-FRS beam tracking contribution includes Gas Emission-Time Projection Chambers (GEM-TPC), Secondary Emission grid detectors (SEM-grid), Multi-Sampling Ionization Chambers (MUSICs) and drive ladders to operate both detector types. Together with the time-of-flight measurements these should provide unambiguous event-by-event particle identification.
GEM-TPC detectors
Gas Emission-Time Projection Chamber detector is used for measurement of (x,y,z) position of slow extracted beam on the event-by-event basis. It should have near 100% tracking efficiency and stand counting rates up to 10 MHz.
More detailed information can be read from the following publications:
- GEM-TPC Trackers for the Super-FRS at FAIR – Cern
- Super-FRS GEM-TPC prototype development based on n-Xyter asic for the FAIR facility
SEM-grid detectors
Secondary electron EMission grid detector is used for beam profile measurement of high intensity beam.
Drive Ladders
Drive Ladders or actuators are used to operate both the GEM-TPC detectors and SEM Grid detectors. These will insert the detectors in beam when in operation and if required out from the beam axis.